Lift Buffers

The new ACE safety shock absorber series LP are self-contained, maintenance-free and ready for installation. The hydraulic buffers can be used for elevator cars and counterweights. The LP series are certified according to the EG directive 95/16/EG. The lift buffers are equipped with mechanical safety limit switches according to DIN EN 50047. The switching signals can be integrated into the elevator control, while the rubber plate reduces impact noises. The lift buffers’ compact dimensions permits the mounting in nearly all elevators. They are also directly interchangeable with other makes of hydraulic lift buffers. The LP buffer series are categorized by two nominal speed ranges. LP40 models are approved for nominal speeds from 1 to 2 m/s and LP50 models are approved for nominal speeds from 2.5 to 3.2 m/s.

ACE offers special versions for inclined elevators with external oil tanks. These models are certified according to the EG directive 95/16/EG like the LP types.

Function:

During the buffer impact stroke the piston rod is pushed into the cylinder tube. The hydraulic oil is displaced and pressed through a series of small metering orifices in the cylinder jacket. Inside the outer jacket the oil is collected. At the same time the gas volume above the hydraulic oil is compressed. The hard chrome-plated piston rod is sealed. After release of the piston rod the compressed gas volume presses the hydraulic oil back into the cylinder, pushing the piston rod out again. When the piston rod is extended the oil level can be checked through a glass sight gauge.

Impact velocity range:

LP40       1 to 2 m/s

LPSA40  1.0 to 1.6 m/s

LP50       2.5 to 3.2 m/s

LPSA50  2.5 m/s

Material:

Steel body, piston rod hard chrome-plated.

Mounting:

Vertical position or inclined position

Operating temperature range:

5 °C up to 50 °C. Lower temperatures on request.